Stop mechanism for knitting machines



Feb. 16, 1932. J. WACHSMAN 1, 45,455

STOP MECHANISM FOR KNITTING MACHINES Filed Jan. 29. 19.51

INVENTOR ATTORNEY Patented Feb- 16, 1932 PATENT QFFECE JACOB WACHSMAN, OF BROOKLYN, NEW YORK STOP? MEGEANISM. FOR KNITTING MAGB'IN'EQ Application filed January 29, 1981. Serial No. 512,158.

My invention relates to knitting machines and particularly to the mechanism employed for actuating the stop handle of the drive mechanism of the machine when a thread breaks or the end of a thread has been reached,etc.

The invention has for an object to provide an improved controller mechanism associated with the stop handle and electrically released by the breaking of the thread or when an end of a thread is reached as when the bobbin becomes empty.

Further, the invention has for an object the provision of a controller unit which can be used in almost any position on the knittin machine wherever the stop handle may be ocated, and one which will operate either to pull down or push up the stop lever according to the particular direction in which that lever must be moved to stop the-machine.

Further, the invention has for an object to providela controller which, when set'and also after its release, will be on open circuit so that the attendant cannot get shock should he touch the controller.

Other objects will in part be obvious and in part be pointed out hereinafter.

To the attainment of the aforesaid objects and ends, the invention still further resides in the novel details of construction, combination and arrangement of parts, all of which will be first fully described in the following detailed description, then be particularly pointed out in the appended claims, reference bein had to the accompanying drawin s, in w ich:

igure 1 1s a perspective view of the controller in the set position.

Figure 2 is a vertical section on the line '22 of Figure 1.

Figure 3 is a face view of the latch and magnet box with cover removed.

Figure 4 is a perspective view of, an end detector unit use as a circuit closer in cooperation with my controller.

Fi ure 5 is a circuit diagram of the electric circuit involved.

In the drawings, reference indicate figures, 1 represents in which like numerals of like parts 'in all of the the leg or supporting and the instrument may one of these arms will engage an electric frame of a knitting machine to which the controller is secured and 2' indicates the stop handle of the driving mechanism that throws the clutch or shifts the drive belt that stops the machine. 3 represents the base of the controller from which attaching lugs 4 and 5 (having suitably bushed holes) project and at either end the base has webs 6 (top) and 7 (bottom), these webs being provided with square openings 10 constituting bearings for the longitudinal plunger bar or rod 11.

The base 3 is also provided with a longi; tudinal slot 8 and one or more sets of holes 9 bushed with insulation.

The plunger bar at either end is provided with stop handle engaging) arms 12, 15' and 14,

e so set that either the stop handle, the particular arm for engagingthe stop handle being determined by the position in which the base 3 may be mounted on the machine. l I

15 is a latch pawl which is pivoted at 16 to the rod 11 and projects through the slot 8, there being a spring 17 on the rod 11 for the purpose of impelling that rod in a direction to cause actuation of the stop handle 2.

1818ar: is a suitable metallicbox that is secured to and insulated from the base 3 on the side opposite the place where the bar 11 is located. This box includes a front plate 19 and in this box .is rockably mounted a rockable locking member 20 which is pivoted on a rod or shaft 22 (mounted in the box 1818w) and is impelled to a holding position by a coil spring 21. 7

Suitable bearings 23 are provided for the rod 24 which carries a latch lever 25, the latter'. being arranged to cooperate with the armature 29, the armature holdin the latch lever 25 against movement when t e electromagnet 28 is de-energized. 26 is a latch lever moving rocker member which engages. with the latch lever 25 and is itself enga ed by a pin 27 on the rockable locking mem er 20.

When the parts are in the position shown in Figure 2 the member 20 18 held against gi pvement by means of the elements 25, 26 and The latch lever 25 has a slotted arm 253 to leave a lip 250: which la s over the armature lip 29a: normally. The ever 25 has an arm 251 which, together with the body of the lever 25, forms a V-shaped recess for the end of the lever rocking member 26. The member 26 is ivoted at 262: and hasa recess for the pin 2 When the magnet 28 is de-energized the parts remain as positioned in Fi res 2 and 3. When, however, the magnet 1s enerzed it draws over. the armature 29 until its 1p 292: lines up with the arm25 whereupon ure 2. This causes the in 27 to rock the mem-- ber 26 in a countercloc ure 2 and thereby efl'ects engagement with ise direction in Figthe member 253 to move it in a clockwise direction in Figure 2. This carries the notched end'oithe lever u alon ide the armature free from the ho ding influence of the armature. As soon as member 15 shall have released itself from member 20, s ring 21 will move member 20 in a clockwise direction in Figure 2; pin 27 will again engage the recess in member 26 and turn that member in a clockwise direction in Figure 2, which causes the member 26 to ress. down on the lever 25 and brin its en 25w again below the armature portion 29w, whereupon the armature springs back to the position shown in Figure 3 and again locks the member 25 against movement.

One terminal of the electro-magnet is connected to an insulated terminal 30carried by the box while the other terminal of the magnet is grounded to the box as at 31, it being understood that the box 18 is made of a conducting material.

The circuit closer which may be used to actuate the magnet 28 may be an end detector consisting of a mounting plate 32 hav ing one or more slots 33, and mounting ears 34 as best shown in Figure 5. 35 is a foot which carries one or more porcelain hushed eyes 36 through which the thread is passed while 37 indicates a tension device which may or may not be used as found desirable. The late 32 has one or more slots 33 through whic porcelain eyes 39 that are carried y the pivoted arm 38 ma be proJected so that the thread can be asse through it, and when so passed throug it holds the circuit open between the contact heel 41 and the insulated contact spring 43, the latter being mounted on the box 42.- is the pivoted axis of the arm 38.

Referring now to Figure 5 it w1ll be seen that the battery 45 has one terminal connected via wire 44 with the insulated spr ng 43, while its other terminal is connected via wire 46 to the insulated terminal 30.

The plate 32 of the end detector is presgrounded to the frame of the machine as is also the rod 11. Thus, when the circuit is closed between the contacts 41 and 43 as when the end of the thread asses through the eye .39, or the thread brea and releases the eye 39 current will flow from the battery throu h the circuit to energize the magnets 28 '(it being assumed, of course, that the controller is set with the rockable locking member 20 and the latch pawl 15 in contact) thereby energizing the electro-magnet and releasing the latch lever 25, the latch lever 25 being released, the spring 17 will force the rod 11 in a direction to disen age the latch pawl 15 from the rockable locii 20 and bring one or another of the stop handles 12, 13 and 14, as the case may be, into operative enga ement with the stop handle 2 to etc the mac ine. I

It wi be noted that when the controller is set and the machine is runnin properly the circuit will be open between the elements 41 and 43 and immediately after the circuit has been closed by those elements to energize the magnet 28, the circuit will be broken between the elements 15 and 20, Thus/the circuit is closed only for an instant and at all other times the controller is on open circuit so that there is no danger of an attendant getting a shock when he attempts to re-set the controller. g y

The box 18 may be mounted in a variety of positions on the base 3 and the latch pawl 15may be reversed at times to correspond with a reverse mounting of the box, thus making it possible to apply the device to almost any type of knitting machine, since the base 3 is not required to be mounted in one particular posltion.

From the fore oing description, taken in connection with t e accompanying drawings, it is thought the complete construction, operation and advantages of my invention will be 1clear to those skilled in the art to which it reates.

What I claim is:

1. In electric sto mechanism for power driven machines, t e combination with a circuit closer, of a controller comprising a base having provisions for mounting it on the machine and having end portions provided with rod apertures, said base being longitudinally slotted, a rod longitudinally movably mounted in said apertures, a latch pawl mounted on said rod, a rod impelling ng member spring cooperating with said rod, a box mounted on said base and containing an electro-magnetically releaseable locking member, the latter cooperating with said pawl to hold said rod in a set position, stop-handle-engaging means carried b said rod for throwmg the stop handle 0 the power drivin mechanism to a stop position when said rod is released, and an electric circuit including a source of energy, said circuit closer, and

neaaeee the electro-magnets of said eleotro maeticallyreleasablelocl'ing mech arr- 2. In electric g mechanism for power driven machines werein is provided a cuit closer controlled by the material emu! operated on and wherem is provided a stop handle; a controller for actuating said stop handle, said controller comprislng a base plate having top and bottom Webs apertnred to provide bearings, a rod reciprocably mounted'in said bearings, a spring to move said rod in one direction, stop-handleengag means carried by said rod, a latch pawl on said rod, said base having a longitudinal slot into which said gavel projects, a box secured to said base an containina rockable locking member to be engaged said pawl to hold said rod against move= ment, an electro-magnet, an armature, means connecting said rockable 11 member with. said armature to be held against movement thereby, said armature when efiected by said magnet serving to release said connecting means 7 3. In electric stop mechanisms for power driven machines wherein is provided a sin cuit closer controlled b the material being operated on and wherein is provided a stop handle; a controller'for actuating said ston handle, said controller comprising a base plate having top and bottom Webs apertured to provide bearings a rod reciprocably mounted in said bearmgs, a spring to move said rod in one directmn, stop-handle-engaging means carried by snid rod a latch pawl on said rod, said base having a lon tudinal slot into which said pawl projects a box secured to said base and containing a rockable locking memberto be engaged by said lpawl to hold said rod against movement an e ectro-m'agnet, an armature,-means connecting said rockable loot member with said armature to be held against oveent a means, means thereby, said armature when efiected by said magnet servin to release said connecting or insulatin said boa: from said base, one terminal of sand maet bein grounded to said box, on insulate termina connection carried by said box to which the other terminal of said run and an electric sub-circuit including a so 1; of energy, and a circuit closer, one terminal of which sub-circnit is connected with said base and the other terminal of which is con nected to said inated terminal. JACOB WAGES. a.

et is connected, 

